90 BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



No. 25, p. 208, October 24, 1905.— Elliot, Check List Mamm. North Amer., 

 Field Columb. Mus., publ. 105, zool. ser., vol. 6, p. 473, 1905; Catal. Mamm. 

 Field Columb. Mus., Field Columb. Mus., publ. 115, zool. ser., vol. 8, p. 500, 

 1907. — Miller, List North Amer. Land Mamm. 1911, Bull. U. S. Nat. Mus., 

 No. 79, p. 93, December 31, 1912; List North Amer. Recent Mamm. 1923, 

 Bull. U. S. Nat. Mus., No. 128, p. 93, April 29, 1924. 

 Myotis californicus jaliscensis Menegaux, Bull. Mus. d'Hist. Nat. Paris, vol. 

 7, p. 321, 1901 (near Lake Zacoalco, Jalisco, Mexico, type in Paris Mu- 

 seum). — Miller and Rehn, Proc. Boston Soc. Nat. Hist., vol. 31. p. 121, 

 August 27, 1903. — Elliot, Land and Sea Mamm. Middle Amer., Field 

 Columb. Mus., publ. 95, zool. ser., vol. 4, p. 579, 1904. — Trouessart, Catal. 

 Mamm. viv. foss., suppl., p. 93, 1904. — Elliot, Check List Mamm. North 

 Amer., Field Columb. Mus., publ. 105, zool. ser., vol. 6, p. 477, 1905. 



Type locality. — Santa Cruz del Valle, Guadalajara, Jalisco, 

 Mexico. 



Type specimen. — Adult male, skin and skull. No. 2696 Amer. Mus. 

 Nat. Hist., collected at Santa Cruz del Valle, Guadalajara, Jalisco, 

 Mexico, September 7, 1889, by Dr. A. C. Buller. 



Distribution. — From the highlands of Guatemala northward to 

 western Arizona and southern California. 



Diagnosis. — Size slightly below the maximum for the species; 

 greatest length of skull 15.6 to 17.0 mm. ; color dark. 



Descrnptimi. — Topotypes are a dull " sepia " (Ridgway, 1912) 

 above, the hairs with their basal three-fourths about " blackish 

 brown " ; below much paler, the tips of the hairs pale cream-buff, 

 their dark " plumbeous-black " bases showing through slightly except 

 at the borders of the thighs, where the hairs are pale cream buff 

 throughout. Specimens from La Palma, Michoacan, Mexico, average 

 a very little browner than two examined from Guadalajara. One in 

 worn pelage from Lake Atitlan, Guatemala, is not appreciably differ- 

 ent from topotypes. Northward from central Mexico to Arizona 

 there seems to be very little change in tint. A skin from Tamaulipas, 

 Mexico, and others from Tucson and the Mexican border (monument 

 77) of Arizona are scarcely distinguishable, and seem best referred 

 to true velifer^ while a series from Roosevelt County, Ariz., con- 

 tains specimens some few of which are nearly as pallid as in 

 incautus. while one or two are about as dark as typical Mexican ex- 

 amples, so that the series is taken to show that intergradation between 

 the typical form and the eastern M. velifer incautus occurs in this 

 region. 



3Ieasuremenis. — For measurements see tables, pages 94 and 96. 



Ward (1904) presents a detailed study of the variations in pro- 

 portions among a series of 167 bats of this species from Las Vegas, 

 Vera Cruz. The forearm measurement averaged about 42 mm. 



Specimens examined. — Total numbei- 372, from the following 

 localities : 



